Mckinsey has a very similar initiative, with results publised at office level in a weekly basis.
There, a number of KPIs are reported: whether teams are going home for dinner, overall mood, whether people have been ables to fullfull their personal comitments, etc.
However, in Mckinsey, the performance of the teams in this regard is not linked to any sort of bonus, etc.
I know in Bain, average of hours worked per team and at office level have been weekly reported and commented for years too.
Hope it helps!